Harrow attachment



D J ERWIN HARROW ATTACHMENT.

APPLICATION FILED 11411224. 1920. 1,402,586. Patented Jan. 3,1922;

incense.

uairan stares mm orri DAVID JOSHUA ERWIN, OE'LAWRENCE, NEBRASKA;

HARROW' ATTACHMENT.

Application filed June #4,

To all whom it may concern."

Be it known that I, DAVID JOSHUA ERWIN, a citizenof the United States, residing at Lawrence, in the county of Nuckolls and Stateof Nebraska, have invented certain new and useful Improvements in Harrow Attachments 1 ifollowing to scription of able others skilled in the art and I do hereby declare the be a full, clear, and exact dethe invention, such as will ento which it appertains to make and use the same.

The object ofthe invention is to provide a soil pulverizing attachment for a harrow designed as a means for supplementing the action of the harrow teeth or of being used independently thereof according to the requirement of the soil to be treated and adapted by its construction to roll laterally to accomplish the effective crushing and pulverizing of thesoil, and a further object is to provide such a construction of the device as to adapt it to be reversed to vary the effect upon the soil to suit the condition of the latter; and with these objects in view the invention consists in a construction and I combinationof parts of which a preferred embodiment is illustrated in the accompanying drawing, wherein:

Figure l is a side view of the attachment; Figure v2 is a detail sectional View of a portion of the same to show the mounting of the teeth designed for engagement with on the surface of the the surface of the soil. 7

The device consists essentially of a roller 10 having a cylindrical body portion 11 and conical end portions 12 at the apex of each of which is arranged a swivel draft eye 13, to the end that the attachment may be hitched to a draft appliance with either end forward and moved longitudinally or axially soil, with freedom to roll laterally in the crushing and pulverization of the same."

Thecylindrical portion of the device carries a plurality of teeth or spurs 14 which are pivotally mounted in seats 15 formed in the surface thereof, the pivotal movement of said teeth or spurs being limited in one direction to a position perpendicular to the surface of the cylinder or radial with reference thereto, and beinglirnited in the other Specification of Letters Patent.

a cylinder, and a means Patented Jan. 3, 1922. 1920. Serial No. 391,488.

direction to a position at an inclination to the surface of the cylinder or atan angle to the axis of the same. In other words the teeth or spurs are pivotally mounted for arrangement either 1n radial or inclined relation to the axis or axial center of the cylinder and are positioned in one relation or the other according to whether the device is moved in one direction other words whether thedraft appliance is connected with one terminal thereof or the other. It will be seen that if the cylinder is drawn for example in the direction indicated by the arrow in Figure 1 the teeth or,

spurs will swing outward to a position which is radial in relation to the axis of the cylinder whereas if the device is moved in a direction opposite to that indicated by the arrow the teeth or spurs will fold assume a position at an acute angle to the axis of the cylinder. Obviously thedifferent positions of the teeth or spurs will involve a different or a modified action upon,

the soil traversed thereby, and the inclined i i arrangement of the teeth or spurs is particu larly desirablewhen the apparatus is being moved over a surface Whichis more or less obstructed by weeds, grass or loose fibrous substances. 7 V

A band 16 surrounds and is secured to; each end of the body portion 11. These bands project beyond the ends of the body portion 11 and they receive the inner ends of the end portions 12., The end portions drical body portion and terminal draft applying means, said cylindrical surface being provided with pivot-aliteeth or spurs variable in position longitudinally of the cylinder to 100 occupy positions respectivelyin radial and acute angular relationwith the axis thereof,

or the other, or in 60 partly to 70 my invention, what movement of the cylinder to occupy'posn tions respectively in radial and in acute axls thereof. in tesbimony whereof, I affix my signature angular relation with the in presence of two witnesses. DAVID JOSHUA E Witnesses:

C.'F. GUND, L. M. KLEBER.

RWIN. 

